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Finding the Fourth Proportional to 269,939.52, 405,154.98 and 143,685.78

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Solution

The fourth proportional to 269,939.52, 405,154.98 and 143,685.78 is: 215,659.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    269,939.52 : 405,154.98 = 143,685.78 : x
  2. Step 2: Convert to fraction form
    269,939.52/405,154.98 = 143,685.78/x
  3. Step 3: Cross multiply
    269,939.52x = 405,154.98 × 143,685.78
  4. Step 4: Simplify right side
    269,939.52x = 58,215,009,322.18
  5. Step 5: Solve for x
    x = 58,215,009,322.18/269,939.52
  6. Step 6: Final answer
    x = 215,659.45

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.